VPC router changed from UNKNOWN to PRIMARY

[sbrueseke]

I see the following alert in ACS:
Redundant virtual router r-579-VM just switch from UNKNOWN to PRIMARY at 21 Jan 2025 04:22:18

I want to investigate this, because as far as I know this should not be done without any reason. Here is the output of the management server log.
management-server.cut.log

I am not really sure why this happened and need some help to troubleshoot. The agent.log does not show anything regarding this.

[weizhouapache]

you might search "to UNKNOWN at" to see why it is set to unknown state.

if VR is stopped or host agent is not Up, VR is set to UNKNOWN state

[sbrueseke]

Thx for the reply! :-)
I do not find any entries with "to UNKNOWN at" in the management-server log. I have no idea why the router was UNKNOWN in the first place. The only thing which comes to my mind is that this change happend during peak backup hours. So network of all KVM hosts were heavily in use. Do you think that is a coincidence?